Nustock ointment
Electrolytes
Vitamins, E, B complex, calcium citrate
Wound rinse such as saline or
Hibiclense
Wound antibiotic cream
Valbazen Goat wormer
If possible:
Amoxicillin for general infections, wounds, broken internal eggs.
Terramycin for eye infections
Duramycin/LA 200 for...
10 weeks is too young to sex by feathers, male specific feathers won't grow in for another month.
If you want to actually know, post pictures if the head.
Stop the herbs and pepper, it won't help and can harm them.
What is their main diet?
You can use a broad spectrum dewormer such as safe guard or valbzen.
Pea comb is genetically tied to blue eggs. I'd say pea comb and beard/muffs though, a silverudd or cream leg bar will have none of the above features and they lay green/blue.
Sorry you lost a bird.
When you get a new roo, quarantine him for at least a month and then keep him on the other side of a fence for a few weeks so everyone can see but not touch. The girls should accept him no problem. But if you don't need fertilized eggs, there's no point to having a roo.